Rheology of Reactively Compatibilized Polymer Blends with Varying Extent of Interfacial Reaction

Asthana, H.; Jayaraman, K.

doi:10.1021/ma980181d

Cited by 71 publications

(75 citation statements)

References 23 publications

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“…It can be seen that a good result have not been obtained for fitting the experimental data with the model for PET/PA66 and PET/PA66/EP1% where β (ω) could not be calculated for them and the simple form of Palierne was used. Such trend has been seen in studies of previous researchers (Yee et al 2009, Asthana andJayaraman 1999). However for two PET/PA66/PE3% and PET/PA66/EP5%, an appropriate fit was obtained with general model.…”

Section: Fig 13supporting

confidence: 73%

The influence of epoxy resin on the morphological and rheological properties of PET/PA66 blend

Khoshnevis

Ali

2012

Rheol Acta

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Interfacial reactions have dominant effects on the morphological and rheological properties of compatibilized polymer blends. This work aims to investigate the effect of epoxy resin, as a coupling agent, on the interface properties and subsequent influences on the morphological and rheological properties of polyethylene terephthalate/polyamide66 (PET/PA66) blend. PET/PA66 70/30 blends with different amount of bisphenol A epoxy resin (0, 1, 3, and 5 wt.%) were prepared. SEM micrographs show reduction in droplet size with increasing epoxy resin concentration, confirming the reactive compatibilizing effect of the epoxy resin. Reactions at the interface of the PET-EP-PA66 blend are confirmed by FTIR spectra. Shear viscosity results demonstrates that adding epoxy resin could suppress the interfacial slip at the blend interphase. Obtained results from storage modulus (G ) curves show the presence of one plateau for the blends at low frequency region; nevertheless, relaxation spectra indicate the presence of two more relaxation mechanisms than precursors which are related to the shape relaxation of droplets and the interface relaxation. The presence of the interface relaxation time in the blend without epoxy resin can prove the presence of reactions between two condensation polymers; however, adding the epoxy resin results in reducing both relaxation time and interfacial tension and increasing interfacial shear modulus. These observations indicate that the epoxy resin has been successful to boost the reactions at the interface between two polymers. Fitting the obtained experimental data using Palierne model indicates that the general Palierne model could describe rheological properties of the blends very well.

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Section: Fig 13supporting

confidence: 73%

The influence of epoxy resin on the morphological and rheological properties of PET/PA66 blend

Khoshnevis

Ali

2012

Rheol Acta

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“…The reason for the formation of the ellipsoidal particles could be ascribed to the ratio of the shear stress and the interfacial tension, which was defined by the capillary number Ca： R is the radius of the particles, σ is the interfacial tension, η is the viscosity of the matrix and γ& is the shear rate. [40][41][42] When the shear stress overruled, the particles deformed along the shear field and finally broke up into particles; on the contrary, no breakup occurred when the interfacial tension contracted the shear stress. The shear stress was constant in our experiment, while the interfacial tension was significantly reduced by the RL or RC compatibilizers, and so the morphology development indicated a variation of interfacial tension; the greater deformation implied a lower interfacial tension and furthermore a better emulsifying effect of the in-situ formed PLLA grafted RC polymers at the interface.…”

Section: Discussionmentioning

confidence: 99%

Synthesis of Reactive Comb Polymers and Their Applications as a Highly Efficient Compatibilizer in Immiscible Polymer Blends

Dong

Wang

et al. 2015

Ind. Eng. Chem. Res.

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Reactive comb (RC) polymers were synthesized by copolymerizing methyl methacrylate (MMA) with glycidyl methacrylate (GMA) and a kind of MMA macromer. The obtained molecules had both epoxide groups and long PMMA side chains distributed randomly along the PMMA backbone. The synthesized RC polymers were applied as compatibilizers in an immiscible poly(L-lactic acid)/poly(vinylidene fluoride) (PLLA/PVDF) system. Compared to their linear counterparts, only 1 wt% of RC polymers with appropriate length of side chains significantly reduced the size and enhanced the uniformity of the PVDF dispersed phase in PLLA matrix and the RC-compatibilized blends exhibited a significant improvement in fracture strain. The higher compatibilization efficiency of RC polymers was ascribed to the existence of PMMA side chains, which improved the stability of RC polymers at the interface of immiscible blend and this was demonstrated by TEM.

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“…(Gleinser et al, 1994;Asthana and Jayaraman, 1999;Ziegler and Wolf, 1999;Van Puyvelde et al, 2001;Macaubas et al, 2005;Elias et al, 2007;2008;Hyun and Wilhelm, 2009;. Ziegler and Wolf (1999) previously reported the correlation between rheological properties and composition ratios of Poly(dimethylsiloxane)/Poly(dimethylsiloxaneran-methylphenyl-siloxane) (PDMS/COP) blends.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear behavior of PP/PS blends with and without clay under large amplitude oscillatory shear (LAOS) flow

Salehiyan

Song

Hyun

2015

Korea-Aust. Rheol. J.

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Dynamic oscillatory measurement, i.e., small amplitude oscillatory shear (SAOS) and large amplitude oscillatory shear (LAOS) test was used to investigate linear and non-linear viscoelastic properties of Polypropylene (PP)/Polystyrene (PS) blends with and without 5 wt.% clay (C20A). Fourier transform (FTRheology), Lissajous curves and stress decomposition methods were used to analyze non-linear responses under LAOS flow. Composition effects of blends were investigated prior to compatibilization effects. Elevated concentrations of dispersed phase (PS) increased the moduli G'(ω) from SAOS test and G*(γ 0 ) from LAOS test of the blends as well as strain thinning behavior. Interestingly, addition of 5 wt.% clay (C20A) boosted moduli of the blends as well as led to similar strain thinning behaviors among the PP/PS/C20A blends, except for the (90/10) PP/PS blend. The latter did not show improved rheological properties despite morphological improvements, as shown by SEM. Results from SEM and improved rheological properties of PP/PS/C20A blends revealed the compatibilization effects of clay (C20A) particles regardless of size reduction mechanisms. Third relative intensities (I 3/1 ) from FT-rheology were found to be sensitive to clay (C20A) additions for the (70/30) and (30/70) PP/PS blends. Similarly, Lissajous curves could detect changes upon clay (C20A) addition, specifically at lower strain amplitudes whereupon addition of 5 wt.% clay resulted in the closed loops of Lissajous curves showing a more ellipsoidal shape due to increased elasticity in the blends. However, detection of these changes at larger strain amplitudes was more challenging. Therefore, stress decomposition (SD) method was applied for more precise characterization as it decomposes the total stress (σ) into elastic stress (σ') and viscous stress (σ''). Using SD method, elastic stress was more distorted, especially, strain hardening, while the total stress response remained almost unchanged at larger strain amplitudes.

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Rheology of Reactively Compatibilized Polymer Blends with Varying Extent of Interfacial Reaction

Cited by 71 publications

References 23 publications

The influence of epoxy resin on the morphological and rheological properties of PET/PA66 blend

The influence of epoxy resin on the morphological and rheological properties of PET/PA66 blend

Synthesis of Reactive Comb Polymers and Their Applications as a Highly Efficient Compatibilizer in Immiscible Polymer Blends

Nonlinear behavior of PP/PS blends with and without clay under large amplitude oscillatory shear (LAOS) flow

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